Malicious PDF — malware analysis report

Static analysis result for SHA-256 f496399ced30b6d2…

MALICIOUS

PDF

67.8 KB Created: 2021-07-07 04:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 034ecc8b9d274f20864f554ee8cb5cb0 SHA-1: 7ea4126edd3f8824ae97edf91435cecbff9832f9 SHA-256: f496399ced30b6d22b4d09b9960540b805a6d339845e0bee3d22b15275ef4010
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely to phish users or lead them to malicious content. The document body is unreadable, but the heuristics strongly suggest a link farm designed to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8402

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca9328881b---90379628342.pdf In PDF document text
    • https://mimpiindah1.com/contents//files/wunarabinovumagimuga.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zodovopekigufozizekup.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a8cbfd68---jaxupesa.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d02d6854a0---rofupatage.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/35d1b38c1f3d3ecaaf98d0310279921a/zakejof.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abe75700c8---sekapivasiwavegufa.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a5d15d3fe---56853773602.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dccc84a579---zidaditabulozomurujidade.pdfIn PDF document text
    • http://aimic.com/userfiles/file/77478601966.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/15166835696.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ede1748328baed77f055dd00bf0d4ca9/zufavuga.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160abe18c2866c---sitikolarag.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/7kmlvfj7n50c94u3n5d7jh4q5l/xewutokupi.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/98361322230.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/bdb76e645e31d75ae7694afa6137fb8c/49204535892.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a046d16b1---mobipefuwixosogo.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6851d7e68---lijazeluzuxa.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/wujisepisafegediwifav.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/wifomexorizu.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/vinakupajuvipogovemawo.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/xisikigigobiruxarokebu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=area+between+groin+and+thighPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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